    var flag=1;
    function clickdiv(){
        if(flag==1)
        {
            rightnavmove();
            flag=0;
        }
        else
        {
            rightnavreturn();
            flag=1;
        }
    }
    function rightnavmove(){
        document.getElementById("arrow").innerHTML = "＞";
        document.getElementById("arrow").style.backgroundColor='rgb(12,130,255)';
        document.getElementById("arrow").style.color='white';
        document.getElementById("div-rightnav").style.width='882px';
        flag=0;
    }
    function rightnavreturn(){
        document.getElementById("arrow").innerHTML = "＜";
        document.getElementById("arrow").style.backgroundColor='white';
        document.getElementById("arrow").style.color='rgb(116, 164, 223)';
        document.getElementById("div-rightnav").style.width='442px';
        flag=1;
    }